# An action for setting up poetry install with caching.
# Using a custom action since the default action does not
# take poetry install groups into account.
# Action code from:
# https://github.com/actions/setup-python/issues/505#issuecomment-1273013236
name: poetry-install-with-caching
description: Poetry install with support for caching of dependency groups.

inputs:
  python-version:
    description: Python version, supporting MAJOR.MINOR only
    required: true

  poetry-version:
    description: Poetry version
    required: true

  cache-key:
    description: Cache key to use for manual handling of caching
    required: true

  working-directory:
    description: Directory whose poetry.lock file should be cached
    required: true

runs:
  using: composite
  steps:
    - uses: actions/setup-python@v4
      name: Setup python ${{ inputs.python-version }}
      with:
        python-version: ${{ inputs.python-version }}

    - uses: actions/cache@v3
      id: cache-bin-poetry
      name: Cache Poetry binary - Python ${{ inputs.python-version }}
      env:
        SEGMENT_DOWNLOAD_TIMEOUT_MIN: "1"
      with:
        path: |
          /opt/pipx/venvs/poetry
        # This step caches the poetry installation, so make sure it's keyed on the poetry version as well.
        key: bin-poetry-${{ runner.os }}-${{ runner.arch }}-py-${{ inputs.python-version }}-${{ inputs.poetry-version }}

    - name: Refresh shell hashtable and fixup softlinks
      if: steps.cache-bin-poetry.outputs.cache-hit == 'true'
      shell: bash
      env:
        POETRY_VERSION: ${{ inputs.poetry-version }}
        PYTHON_VERSION: ${{ inputs.python-version }}
      run: |
        set -eux

        # Refresh the shell hashtable, to ensure correct `which` output.
        hash -r

        # `actions/cache@v3` doesn't always seem able to correctly unpack softlinks.
        # Delete and recreate the softlinks pipx expects to have.
        rm /opt/pipx/venvs/poetry/bin/python
        cd /opt/pipx/venvs/poetry/bin
        ln -s "$(which "python$PYTHON_VERSION")" python
        chmod +x python
        cd /opt/pipx_bin/
        ln -s /opt/pipx/venvs/poetry/bin/poetry poetry
        chmod +x poetry

        # Ensure everything got set up correctly.
        /opt/pipx/venvs/poetry/bin/python --version
        /opt/pipx_bin/poetry --version

    - name: Install poetry
      if: steps.cache-bin-poetry.outputs.cache-hit != 'true'
      shell: bash
      env:
        POETRY_VERSION: ${{ inputs.poetry-version }}
        PYTHON_VERSION: ${{ inputs.python-version }}
      run: pipx install "poetry==$POETRY_VERSION" --python "python$PYTHON_VERSION" --verbose

    - name: Restore pip and poetry cached dependencies
      uses: actions/cache@v3
      env:
        SEGMENT_DOWNLOAD_TIMEOUT_MIN: "4"
        WORKDIR: ${{ inputs.working-directory == '' && '.' || inputs.working-directory }}
      with:
        path: |
          ~/.cache/pip
          ~/.cache/pypoetry/virtualenvs
          ~/.cache/pypoetry/cache
          ~/.cache/pypoetry/artifacts
          ${{ env.WORKDIR }}/.venv
        key: py-deps-${{ runner.os }}-${{ runner.arch }}-py-${{ inputs.python-version }}-poetry-${{ inputs.poetry-version }}-${{ inputs.cache-key }}-${{ hashFiles(format('{0}/**/poetry.lock', env.WORKDIR)) }}
